Multiple spindle head



April 8 1924.

l M. l.. JEFFREY MULTIPLE srfINDLE HEAD :s shets-sheet 1 ANZ.

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M.l| JEFFREY MULTIPLE SPINDLE HEAD FileDec. 29.919 3 Sheets-Sheet 2 Patented Apr. 8, 1924.

UNITED STATES! MAX L. JEFFREY, oFcLFvFLAND, entre',

VPATENT crm-ca.

assitance VTo FHF convierta' Axtn coni FANY, oF CLEVELAND', onto, .a ,CORPORATION oF o-Hro. j

MULTIPLESPINDLE Application filed December 29, 1919. Serial No. 348,157.

To all/w71 om t may concern.

Beit known that I, L. JEFFREY, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Chio, have invented new and useful Im.

provement in Multiple' Spindle Heads, of. which the following is a specification, the:

principle of the invention being herein ex plained and the best mode in which I have contemplated applying that principle, so as` to distinguish it -from other inventions.

The present invention, relating, as indicated, to a multipleV drill head, is directed to' an yimproved mechanism, in which a plurality of drills may be operated from a single shaft or spindle, and which is so constructed' as to permit the operation of the several drills at the same speed. A further improvement is the provision of means for varying the operative positions of the drills, both circumferentially of the drill head and radially thereof, in this way adapting the mechanism` to many classes ofwork and permitting ahnost unlimited adjustment. Tol the accomplishment of the foregoing and related ends, said invention, then, consistsof the means hereinafter full-y described vand particularlyY pointed out in the claims.

The annexed drawing and the following descrip-tion set forth in detail certain mechanism embodying` the invention, such disclosed means constituting, however, but one of various mechanical forms in whichthe principle of the invention may be used.

In said annexed drawing Fig. 1 is a vertical central section partly i in elevation of my improved drill head; Fig. 2 is a section ou the line 2-2, Fig. l; Fig. 3 is a section on the line 3-3, Fig. 1; Fig. 4 is a section on the line 4l, Fig. 1; and Fig. 5 is a bottom plan view of the head.

In Fig. 1 I have shown the driving shaft or spindle 1 of a drill machine housed in a supporting sleeve 2. Fastened to the drill spindle or socket 1 is a driving spindle proper 3, which is attached to a sleeve 4,

carrying al mainpdriving gear 5 on its lower end. This driving gear 5 is in mesh with gears 6 mounted on the shortshafts 7, one of which also carries a double gear 8, driving gears 9 and 10, of which the former drives a gear 11 mounted on the shaft 12, which is the central drill-receiving shaft of the head, and is in alignment with the axis of the driving spindle 1. The other gear 10 of` the pair of gears 9 and 10 isy of the' same size as the gear 9 and is mountedV ona shaft or spindle 13, whichis arranged in a radial position with respect to the central axis ofthe Ventire head and is yadapted to receive another drillf Y v I p There'- maybe a numberlof shafts or' drillreceiving spindles 13 disposed at various points about the central dillV spindle 12, there ordinarily' being 4rat least two outer' drills in addition to the central-drill. Such other spindles are similarly driven from .they gearj through gearY 6, sha-ft 7 and gears 8 and V10. g Y The supporting sleeve 2 of the drillhea'd is provided with a T-shape'd encircling slot 15, in which are movably received theheads 16 of bolts 18 which extend radially l.outward from-'socket 2. `Carried on the. outside of the head or socketV 2 'are' a seri-@sof brackets 17 which are mounted in anyk desired Lcircum-ferentialy position by the adjustment of bolts 1S. These brackets 17 extend down the outer surface of the socket 2, and arr'eprovided with an inwardly extending flange 19", in which are journaled the shafts 7; These shafts v7 are therefore maintained in exactly the same radial position, irrespective'of the circumfereirtial position or relation of fthe When these caps are swung outwardly about the bolt 21 toward the circumference of the head the drill shafts 13e-.re also carried outward, although they remain in driving engagement with the gears 8, since the arc `of movement of the shafts 13 is the common axis of the bolt 21 and,` the shaft 7 as a center.

The brackets 17 have a circular flange 4:5 in which the shafts7 are mounted, While one los of the brackets 17 is also provided with an Y 24 in the saine radial position with respect to the central drill 12, and thus provides a continuous and permanent drive from the gear 8 to the gear 11 on the central drill. It Will be noticed that the central drill is provided with an upwardly extending end 25 which is journaled in a bushing mounted in the hollow sleeve 4, which is carried in the central spindle of the head. Y

In this construction several drill members may be disposed in any desired relation about the circumference of the head, and may also be adjusted radially by swinging the drill carrying the caps 20 about the bolts 21, since this action Will swing the drills outward and adjust them With respect'to their distance rom'the center of the entire head. Practically any desired relation of the various drills can be secured in this mechanism and there is the added advantage that all of the drills are driven at exactly the same speed, and there is therefore no lost time as is the case in many of the present drill heads Where the central spindle is driven at a speed which is different from that of the outer drills.

Other modesof applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I `therefore particularly point out and distinctly claim as my invention l. In a device of the character described, the combination of a .'head, a centrally mounted driving spindle therein, a central drill rotatably mounted in said driving spindle, a series of brackets movably mountcircumferentially of said head While iemaining at a fixed distance from said central spindle, a drill rotatably mounted on each of said brackets, a circular flange formed centrally of each of said brackets and support-- ing driving connections for said drills, one of said flanges having an extension, and means carried in said extension for rotating said central drill spindle reverscly to said central driving spindle, said connections being operated from said spindle irrespective of tlie position of said brackets. Y

2. In a device of the character described, the combination ofA a head, a centrally mounted driving spindle therein, a tranverse opening through said spindle, a tapered axial socket in the base of said spindle coininunicating with said opening, -a' tapered sleeve fitted Within said socket one end ofl carried in said busli-l driving gear and said rotatable drill spindle. 3. In a device of the character described, the combination of a head, a centrally mounted driving spindle therein, a tapered l axialA socket in the base of said spindle, a tapered sleeve fitted Within said socket, a drill member rotatably carried in said sleeve,

adriving gear secured tc the 'free end of saidy sleeve, and means for transmitting motion from said driving gear to vsaid drill.

Signed. by me, this 22 day of Decem ber, 1919. n

MAX L. JEFFREY.

ing and driving connections between said end of said sleeve, a 

